package com.carrent.demo.Controller;



import com.carrent.demo.Utils.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;


/**
 * 图片
 */
@RestController
@Slf4j
@RequestMapping("/common")
public class CommonController {


    @Value("${carrent.path}")
    private  String BasePath;

    /**
     * 上传图片
     * @param file
     * @return
     * @throws IOException
     */
    @PostMapping("/upload")
    public R upload(MultipartFile file) throws IOException {
        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));

        String filename = UUID.randomUUID().toString()+suffix;

        File dir = new File(BasePath);
        if (!dir.exists())
        {
            dir.mkdirs();
        }

        file.transferTo(new File(BasePath+filename));
       return  R.success(filename);
    }

    /**
     * 下载文件
     * @param name
     * @param response
     * @throws Exception
     */
    @GetMapping("/download")
    public void download(String name,HttpServletResponse response) throws Exception {

        FileInputStream fileInputStream = new FileInputStream(BasePath+name);

        final ServletOutputStream outputStream = response.getOutputStream();

        response.setContentType("image/jpeg");

        int len = 0;
        byte[] bytes = new byte[1024];
        while((len = fileInputStream.read(bytes))!=-1)
        {
            outputStream.write(bytes,0,len);
            outputStream.flush();
        }

        outputStream.close();
        fileInputStream.close();
    }
}
